Fixed compilation after std::io is gone now
Use mut keyword on parameter directly
Refactored calculation of request buffer size
Use octal number for inode mode
Fixed non-OSX build
Refactored filesystem operation dispatch to get rid of the extra function for OS X
Use the "system" abi introduced by mozilla/rust#10367
Added package_id to library crate
Revert "Refactored filesystem operation dispatch to get rid of the extra function for OS X"

This reverts commit 8d1e7c38631a88166fec9d844640997554359698.
Added Travis CI configuration for building and testing with rust-nightly and libfuse-dev
Added Travis build status image to README
Removed fixed_stack_segment attributes (Rust uses large stacks by default now)